<template>

  <div class="app-container">

    <h2 style="text-align: center;">发布新课程</h2>

    <el-steps :active="2" process-status="wait" align-center style="margin-bottom: 40px;">
      <el-step title="填写课程基本信息"/>
      <el-step title="创建课程大纲"/>
      <el-step title="最终发布"/>
    </el-steps>

    <!-- 添加章节 -->
    <el-button type="text" @click="openChapterDialog()">添加章节</el-button>

    <!-- 章节 -->
    <ul class="chanpterList">
        <li
            v-for="chapter in chapterVideoList"
            :key="chapter.id">
            <p>
                {{ chapter.title }}

                <span class="acts">
                    <el-button style="" type="text" @click="openVideo(chapter.id)">添加小节</el-button>
                    <el-button type="text" @click="openEditChatper(chapter.id)">编辑</el-button>
                    <el-button type="text" @click="removeChapter(chapter.id)">删除</el-button>
                </span>
            </p>
            <!-- 视频 -->
            <ul class="chanpterList videoList">
                <li
                    v-for="video in chapter.children"
                    :key="video.id">
                    <p>{{ video.title }}

                <span class="acts">
                    
                    <el-button style="" type="text">编辑</el-button>
                    <el-button type="text" @click="removeVideo(video.id)">删除</el-button>
                </span>
                    </p>
                </li>
            </ul>
        </li>
    </ul>
    <div>
        <el-button @click="previous">上一步</el-button>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="next">下一步</el-button>
    </div>  
        <!-- 添加和修改章节表单 -->
    <el-dialog :visible.sync="dialogChapterFormVisible" title="添加章节">
        <el-form :model="chapter" label-width="120px">
            <el-form-item label="章节标题">
                <el-input v-model="chapter.title"/>
            </el-form-item>
            <el-form-item label="章节排序">
                <el-input-number v-model="chapter.sort" :min="0" controls-position="right"/>
            </el-form-item>
        </el-form>
        <div slot="footer" class="dialog-footer">
            <el-button @click="dialogChapterFormVisible = false">取 消</el-button>
            <el-button type="primary" @click="saveOrUpdate">确 定</el-button>
        </div>
    </el-dialog>

       <!-- 添加和修改课时表单 -->
<el-dialog :visible.sync="dialogVideoFormVisible" title="添加课时">
  <el-form :model="video" label-width="120px">
    <el-form-item label="课时标题">
      <el-input v-model="video.title"/>
    </el-form-item>
    <el-form-item label="课时排序">
      <el-input-number v-model="video.sort" :min="0" controls-position="right"/>
    </el-form-item>
    <el-form-item label="是否免费">
      <el-radio-group v-model="video.free">
        <el-radio :label="true">免费</el-radio>
        <el-radio :label="false">默认</el-radio>
      </el-radio-group>
    </el-form-item>
    <el-form-item label="上传视频">
        <el-upload
            :on-success="handleVodUploadSuccess"
            :on-remove="handleVodRemove"
            :before-remove="beforeVodRemove"
            :on-exceed="handleUploadExceed"
            :file-list="fileList"
            :action="BASE_API+'/eduvod/video/uploadAliVideo'"
            :limit="1"
            class="upload-demo">
        <el-button size="small" type="primary">上传视频</el-button>
        <el-tooltip placement="right-end">
            <div slot="content">最大支持1G，<br>
                支持3GP、ASF、AVI、DAT、DV、FLV、F4V、<br>
                GIF、M2T、M4V、MJ2、MJPEG、MKV、MOV、MP4、<br>
                MPE、MPG、MPEG、MTS、OGG、QT、RM、RMVB、<br>
                SWF、TS、VOB、WMV、WEBM 等视频格式上传</div>
            <i class="el-icon-question"/>
        </el-tooltip>
        </el-upload>
    </el-form-item>
  </el-form>
  <div slot="footer" class="dialog-footer">
    <el-button @click="dialogVideoFormVisible = false">取 消</el-button>
    <el-button :disabled="saveVideoBtnDisabled" type="primary" @click="saveOrUpdateVideo">确 定</el-button>
  </div>
</el-dialog>
  </div>
</template>

<script>
import chapter from '@/api/edu/chapter'
import video from '@/api/edu/video'

export default {
  data() {
    return {
      saveBtnDisabled: false, // 保存按钮是否禁用
      saveVideoBtnDisabled:false,
      courseId:'',
      chapterVideoList:[],
      dialogChapterFormVisible:false,//章节弹框
      dialogVideoFormVisible:false,//小节弹框
      chapter:{//封装章节数据
        title:"",
        sort:0
      },
      video:{//封装小节数据
        title: '',
        sort: 0,
        free: 0,
        videoSourceId: '',
        videoOriginalName:''//视频名称

      },
      fileList: [],//上传文件列表
      BASE_API: process.env.BASE_API // 接口API地址
           
    }
  },

  created() {
    console.log('chapter created')
    if(this.$route.params && this.$route.params.id){
      this.courseId = this.$route.params.id
      this.getChapterVideo()
    }
  },

  methods: {
            //上传视频成功调用的方法
        handleVodUploadSuccess(response, file, fileList) {
            //上传视频id赋值
            this.video.videoSourceId = response.data.videoId
            //上传视频名称赋值
            this.video.videoOriginalName = file.name
        },
        handleUploadExceed() {
            this.$message.warning('想要重新上传视频，请先删除已上传的视频')
        },
        beforeVodRemove(file,fileList){
          return this.$confirm(`确定移除 ${ file.name }？`);
        },
        handleVodRemove(){
          video.removeAlyVideo(this.video.videoSourceId)
            .then(response =>{
                    //提示信息
                    this.$message({
                        type: 'success',
                        message: '删除视频成功!'
                    });
                    //把文件列表清空
                    this.fileList = []
                    //把video视频id和视频名称值清空
                    //上传视频id赋值
                    this.video.videoSourceId = ''
                    //上传视频名称赋值
                    this.video.videoOriginalName = ''
            })
        },
    //============小节相关操作============================
    saveOrUpdateVideo(){
      if(!this.video.id){
        this.addVideo()
      }else{

      }
    },
    openVideo(chapterId){
      this.dialogVideoFormVisible = true
      //设置章节id
      this.video.chapterId = chapterId
      //清空
      this.video.title = ''
      this.video.sort = 0
      this.video.free = 0
      this.video.videoSourceId = ''
    },
    //添加小节
    addVideo(){
      this.video.courseId = this.courseId
      video.addVideo(this.video)
        .then(response =>{
          //关闭弹框
          this.dialogVideoFormVisible = false
          //提示
          this.$message({
            type: 'success',
            message: '添加小节成功!'
          });
          //刷新页面
          this.getChapterVideo()
        })
    },
    //删除小节
    removeVideo(videoId){
      this.$confirm('此操作将删除小节, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(() => {  //点击确定，执行then方法
        video.deleteVideo(videoId)
          .then(response=>{
            //提示信息
              this.$message({
                type: 'success',
                message: '删除成功!'
              });
              //刷新页面
              this.getChapterVideo()
          })
      })
    },
    //============章节的相关操作==========================
    //弹出添加章节页面
    openChapterDialog() {
      //弹框
      this.dialogChapterFormVisible = true
      //表单数据清空
      this.chapter.title = ''
      this.chapter.sort = 0
    },
    //删除章节弹框
    removeChapter(chapterId){
      this.$confirm('此操作将删除章节, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(() => {  //点击确定，执行then方法
        //调用删除的方法
        chapter.deleteChapter(chapterId)
          .then(response =>{//删除成功
            //提示信息
            this.$message({
              type: 'success',
              message: '删除成功!'
            });
            //刷新页面
            this.getChapterVideo()
          })
      }) //点击取消，执行catch方法      
    },
    deleteChapter(){

    },
    //修改章节弹框数据回显
    openEditChatper(chapterId) {
      //弹框
      this.dialogChapterFormVisible = true
      //调用接口
      chapter.getChapterInfo(chapterId)   
          .then(response => {
            this.chapter = response.data.chapter
          })
    },
    updateChapter(){
      this.chapter.courseId = this.courseId
      chapter.updateChapter(this.chapter)
        .then(response =>{
          //关闭弹框
          this.dialogChapterFormVisible = false
          this.$message({
            type: 'success',
            message: '修改章节成功!'            
          })
          //刷新页面
          this.getChapterVideo()
        })
    },
    addChapter(){
      this.chapter.courseId = this.courseId
      chapter.addChapter(this.chapter)
        .then(response =>{
          //关闭弹框
          this.dialogChapterFormVisible = false
          this.$message({
            type: 'success',
            message: '添加章节成功!'            
          })
          //刷新页面
          this.getChapterVideo()
        })
    },
    saveOrUpdate(){
      if(!this.chapter.id){
        this.addChapter()
      }else{
        this.updateChapter()
      }
    },
    //初始化
    getChapterVideo(){
      chapter.getChapterVideo(this.courseId)
        .then(response =>{
            this.chapterVideoList = response.data.list
        })
    },
    previous() {
      console.log('previous')
      this.$router.push({ path: '/edu/course/info/'+this.courseId })
    },

    next() {
      console.log('next')
      this.$router.push({ path: '/edu/course/publish/'+this.courseId })
    }
  }
}
</script>
<style scoped>
.chanpterList{
    position: relative;
    list-style: none;
    margin: 0;
    padding: 0;
}
.chanpterList li{
  position: relative;
}
.chanpterList p{
  float: left;
  font-size: 20px;
  margin: 10px 0;
  padding: 10px;
  height: 70px;
  line-height: 50px;
  width: 100%;
  border: 1px solid #DDD;
}
.chanpterList .acts {
    float: right;
    font-size: 14px;
}

.videoList{
  padding-left: 50px;
}
.videoList p{
  float: left;
  font-size: 14px;
  margin: 10px 0;
  padding: 10px;
  height: 50px;
  line-height: 30px;
  width: 100%;
  border: 1px dotted #DDD;
}

</style>